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pacer: fix b2 deadlock by defaulting max connections to unlimited

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Before this change, the maximum number of connections was set to 10.

This means that b2 could deadlock while uploading multipart uploads
due to a lock being held longer than it should have been.
This commit is contained in:
Nick Craig-Wood 2023-09-25 11:01:51 +01:00
parent c1df3ce08c
commit 96438ff259
2 changed files with 3 additions and 3 deletions
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2
fs/pacer.go
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@ -29,7 +29,7 @@ func NewPacer(ctx context.Context, c pacer.Calculator) *Pacer {
p := &Pacer{ p := &Pacer{
Pacer: pacer.New( Pacer: pacer.New(
pacer.InvokerOption(pacerInvoker), pacer.InvokerOption(pacerInvoker),
pacer.MaxConnectionsOption(ci.Checkers+ci.Transfers), // pacer.MaxConnectionsOption(ci.Checkers+ci.Transfers),
pacer.RetriesOption(retries), pacer.RetriesOption(retries),
pacer.CalculatorOption(c), pacer.CalculatorOption(c),
), ),

4
lib/pacer/pacer.go
View File

@ -75,7 +75,7 @@ type Paced func() (bool, error)
// New returns a Pacer with sensible defaults. // New returns a Pacer with sensible defaults.
func New(options ...Option) *Pacer { func New(options ...Option) *Pacer {
opts := pacerOptions{ opts := pacerOptions{
maxConnections: 10, maxConnections: 0,
retries: 3, retries: 3,
} }
for _, o := range options { for _, o := range options {
@ -103,7 +103,7 @@ func New(options ...Option) *Pacer {
// SetMaxConnections sets the maximum number of concurrent connections. // SetMaxConnections sets the maximum number of concurrent connections.
// Setting the value to 0 will allow unlimited number of connections. // Setting the value to 0 will allow unlimited number of connections.
// Should not be changed once you have started calling the pacer. // Should not be changed once you have started calling the pacer.
// By default this will be set to fs.Config.Checkers. // By default this will be 0.
func (p *Pacer) SetMaxConnections(n int) { func (p *Pacer) SetMaxConnections(n int) {
p.mu.Lock() p.mu.Lock()
defer p.mu.Unlock() defer p.mu.Unlock()